Why is the VMWN 5.5 to 6.7 no longer required as course, for students who want to upgrade their certification to VCP-DCV 2019?
It is only a recommended course for students who have the VCP-DCV 6.5 certification.
As per my reply on your document post yesterday:
VCP5-DCV or VCP6-DCV holders don't need to attend any training as part of VCP-DCV 2019 - they just need to pass 1 exam.
VCP3 or VCP4-DCV holders have to attend a full class and pass 2 exams - the same as a newbie.
This seems entirely fair to me.